Yes I've dumped the dsp binary! I'm using it with RetroArch and it works perfectly (even with RetroArch mGBA, which is not as good as the standalone unfortunately).
Do I have to copy the dsp to a different location for mGBA??

Just wanted to Report that I still can't get any Audio on my N3DS with the latest 0.5.2 release... I'm on the latest Luma CFW with emuNAND 11.2
Please don't Forget about this Problem I'd like to use mGBA for so many games which run better than on Retroarch with it, but can't due to no Audio.